Mercurial > python-compiler.rs

annotate src/ast_scope.rs @ 22:25b202005d1d

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Return a String from ast_dump instead of printing it directly.
author Bastien Orivel <eijebong@bananium.fr>
date Fri, 03 Jun 2016 19:00:09 +0200
parents 38b0d63697b1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 use python_ast::{Module, stmt, expr, alias};
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2
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3 use std::collections::HashMap;
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4
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5 #[derive(Debug)]
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6 struct BlockStatement {
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7 statement: stmt,
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8 block: Option<Block>
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9 }
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10
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11 #[derive(Debug)]
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12 struct Block {
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13 statements: Vec<BlockStatement>,
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14 bindings: Vec<String>
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15 }
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16
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17 #[derive(Debug)]
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18 pub struct Scoping {
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19 modules: HashMap<String, Block>
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20 }
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21
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22 fn scope_expr(expr: expr, block: &mut Block) {
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23 println!("{:?}", expr);
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24 }
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25
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26 fn scope_statement(statement: stmt, block: &mut Block) {
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27 let new_block = match statement.clone() {
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28 stmt::Assign(targets, value) => {
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29 //scope_expr(value, &mut block);
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30 for target in targets {
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31 match target {
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32 expr::Name(name, ctx) => block.bindings.push(name),
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33 _ => () // No new binding.
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34 }
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35 }
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36 None
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37 },
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38 stmt::FunctionDef(name, args, statements) => {
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39 block.bindings.push(name.clone());
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40 let mut function_block = Block{statements: vec!(), bindings: vec!()};
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41 for statement in statements {
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42 scope_statement(statement, &mut function_block);
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43 }
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44 Some(function_block)
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45 },
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46 stmt::ImportFrom(module, names, level) => {
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47 /*
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48 for alias in names {
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49 let asname = alias.asname;
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50 let name = alias.name;
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51 match asname {
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52 Some(name) => block.bindings.push(name),
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53 None => block.bindings.push(name)
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54 }
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55 }
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56 */
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57 None
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58 },
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59 _ => None
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60 };
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61 block.statements.push(BlockStatement{statement: statement, block: new_block});
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62 }
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63
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64 #[allow(dead_code)]
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65 pub fn scope_ast(modules: Vec<Module>) -> Scoping {
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66 let mut scoping = Scoping{modules: HashMap::new()};
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67 for module in modules {
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68 let mut block = Block{statements: vec!(), bindings: vec!()};
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69 for statement in module.statements {
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70 scope_statement(statement, &mut block);
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71 }
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72 scoping.modules.insert(module.name, block);
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73 }
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74 scoping
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75 }
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76
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77 /*
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78 #[derive(Debug)]
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79 struct NewBlockStatement {
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80 statement: stmt,
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81 block: Option<NewBlock>
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82 }
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83
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84 #[derive(Debug)]
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85 enum Binding {
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86 Bound,
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87 Free
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88 }
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89
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90 #[derive(Debug)]
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91 struct NewBlock {
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92 statements: Vec<NewBlockStatement>,
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93 bindings: Vec<String>,
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94 variables: HashMap<String, Binding>
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95 }
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96
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97 #[derive(Debug)]
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98 pub struct NewScoping {
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99 modules: HashMap<String, NewBlock>
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100 }
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101
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102 fn check_expr(expr: expr, block: Block) {
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103 println!("{:?}", expr);
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104 }
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105
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106 fn check_block(block: Block) -> NewBlock {
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107 let mut variables = HashMap::new();
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108 let mut statements = vec!();
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109 for blocked_statement in block.statements {
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110 let statement = match blocked_statement.statement {
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111 stmt::FunctionDef(name, args, body) => {
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112 // No need to recurse here, this will be in a new block.
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113 variables.insert(name.clone(), Binding::Bound);
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114 stmt::FunctionDef(name, args, body)
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115 },
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116 stmt::Assign(targets, value) => {
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117 for target in targets.clone() {
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118 match target {
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119 expr::Name(name) => {
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120 variables.insert(name, Binding::Bound);
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121 },
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122 _ => panic!()
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123 }
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124 }
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125 stmt::Assign(targets, value)
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126 },
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127 any => any
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128 };
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129 let new_block = match blocked_statement.block {
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130 Some(block) => Some(check_block(block)),
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131 None => None
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132 };
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133 statements.push(NewBlockStatement{statement: statement, block: new_block});
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134 }
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135 NewBlock{statements: statements, bindings: block.bindings, variables: variables}
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136 }
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137
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138 #[allow(dead_code)]
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139 pub fn check_scoping(scoping: Scoping) -> NewScoping {
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140 let mut modules = HashMap::new();
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141 for (name, block) in scoping.modules {
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142 modules.insert(name, check_block(block));
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143 }
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144 let mut new_scoping = NewScoping{modules: modules};
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145 new_scoping
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146 }
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147 */